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Russ Suter
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Setting up RADIUS services on a Cisco 1921 and Windows Server 2003

I'm new to Cisco routers and to RADIUS services. I have no idea what I'm supposed to do. I've installed the Internet Authentication Service on the server but that's as far as I've got. I have no idea how to configure IAS on the Windows Server and no idea how to configure the Cisco router to use it when it is configured. Can anyone offer any help?
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Marius Gunnerud

8/22/2022 - Mon
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Marius Gunnerud

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Russ Suter

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That looks like a good start and something worth playing with. However, if I completely screw up the Cisco router settings is there a quick and easy way to reload the last known good configuration without having to power cycle the router?
Marius Gunnerud

you could save the current / old configuration to flash:

copy run flash

you should then be asked to enter a file name to save the configuration under...if i remember correctly.

and then if things go bad issue the following command:

configure replace flash:<file name>

This should replace the running configuration. However I have had varied success with this as it seems on routers the configuration is only merged with the existing configuration.  I have had no issues with using this on switches.
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